Add data disclaimer to seattle.citygroups.org

[chachasikes]

This is a draft of language of terms of use of the data on seattle.citygroups.org -- this disclaimer has been adapted from the disclaimer used by data.seattle.gov

CityGroups makes no claims as to the completeness, accuracy, timeliness, or content of any data contained in this application; makes any representation of any kind, including, but not limited to, warranty of the accuracy or fitness for a particular use; nor are any such warranties to be implied or inferred with respect to the information or data furnished herein. The data is subject to change as modifications and updates are complete. It is understood that the information contained in the site is being used at one's own risk.